Allium lemmonii is a species of wild onion known by the common name Lemmon's onion, named for botanist John Gill Lemmon (1831–1908).

[3] It is native to the western United States, at elevations of 1200–1900 m in the Great Basin of Utah, Nevada, northern and eastern California, eastern Oregon, southwestern Idaho.

[4][5][6] Lemmon's onion grows from a bulb one and a half to two centimeters wide and has a short, flattened stem up to 20 cm tall, which is thin along the edges.

Atop the stem is an inflorescence of 10 to 40 bell-shaped flowers, which may be white to pink.

This is a common plant in its native range.